jademind

This plugin adds a simple bar at the top of each of your wordpress pages with a nice call-to-action button. It can be used to promote your products or display some important news for your visitors. You can customize all background and text colors of the bar to your own desires.
Major features are:
<ul>
<li>Simple and clean bar at top of your page.</li>
<li>The bar sticks to the top of your page while scrolling.</li>
<li>Customize bar background and text color.</li>
<li>Customize call-to-action background and text color.</li>
</ul>

Call-To-Action Bar

The 'Call-To-Action Bar' plugin adds a simple bar at the top of your page with a nice call-to-action button.

cc2017

Want to easily display a sticky window bar at the page bottom while being handy at the back end? Then this plugin is for you. It can easy integrate form, ads, images and html content inside the bar, all the content can be set from admin panel.
Use the Bottom fixed window plugin to create sticky bar that stay in the visible screen area especially at the page bottom when the page is scrolled up or down.
Bottom fixed window plugin cross the screen with a 100% width and the height can be configured. It’s a simple plugin that only adds a block of html and js code just before the closing body tag.
<ul>
<li><a href="http://wp.cancms.com/cancms-wp-float-bar-188" rel="nofollow ugc">Manual and demo</a></li>
</ul>
<h4>Compatibility</h4>
The plugin is not working with all themes! Theme requirements:
<ul>
<li>jQuery is required, jQuery version 1.8.3 (or later) is recommended.</li>
<li>No JavaScript errors caused by other plugins and scripts.</li>
<li><code>wp_head()</code> and <code>wp_footer()</code> functions in header.php and footer.php files.</li>
</ul>

Bottom suspended window, 底部悬浮窗

A simple sticky/suspended/fixed bar to the page footer. It can display ads and form content inside, which can be defined from back end.

Call-To-Action Bar vs Bottom suspended window, 底部悬浮窗